Weber County, UT Insulation Payback
Is attic insulation worth it in Weber County, UT?
Weber County, Utah is zone 5 under DOE's climate map (Cold), which means cold enough that heating, not cooling, is what decides the bill. An uninsulated attic there should be built up to R-60. Going from R-2 to the recommended R-60 costs roughly $3,480 installed for a typical attic (about 1,000 sq ft), and pays for itself in about 1.6 years at an estimated $2,125/year saved. Few home upgrades pay back that quickly.
The breakdown behind the number
Heating accounts for about $2,082/year of that and cooling about $43/year — Weber County needs both. Nationally, Weber County ranks in the 87th percentile for insulation savings potential. Compared only against its own climate zone, Weber County places 10th out of 745. Against Utah's own average of $1,791/year, Weber County runs 19% above that.
Where these numbers come from
The heating and cooling degree days behind this estimate — 7,788 HDD and 267 CDD (base 65°F, 1991-2020 normals) — come from PINEVIEW DAM, UT US, the nearest NOAA station with published normals, 2.2 miles from Weber County's center. By total degree days, Weber County sits at the 86th percentile nationally. Its moisture regime is classified dry, which matters for whether the attic needs a vapor retarder as part of the job — worth asking a contractor about locally.
The smaller top-up scenario
A shallower starting point changes the math: with R-11 already down, only the gap to R-49 needs filling, at roughly $2,280 for an estimated $310/year saved (~7.4-year payback). The math clears comfortably within a normal ownership horizon.
Quotes and materials for this job
Actual quotes will vary by attic access, existing debris, and whether the job needs air sealing first. Treat the $3,480 figure above as a planning number for Weber County, not a bid - contractors typically charge a $600 minimum regardless of job size.
Weber County's numbers, sourced
The methodology guide lists exactly which DOE and NOAA sources feed Weber County's numbers, and where the cost assumptions come from. See the DIY vs. contractor guide for whether a job this size is realistic to do yourself.